<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/**
 * CodeIgniter
 *
 * An open source application development framework for PHP 5.1.6 or newer
 *
 * @package		CodeIgniter
 * @author		ExpressionEngine Dev Team
 * @copyright	Copyright (c) 2008 - 2011, EllisLab, Inc.
 * @license		http://codeigniter.com/user_guide/license.html
 * @link		http://codeigniter.com
 * @since		Version 1.0
 * @filesource
 */

// ------------------------------------------------------------------------

/**
 * Common Functions
 *
 * Loads the base classes and executes the request.
 *
 * @package		CodeIgniter
 * @subpackage	codeigniter
 * @category	Common Functions
 * @author		ExpressionEngine Dev Team
 * @link		http://codeigniter.com/user_guide/
 */

// ------------------------------------------------------------------------

/**
* Determines if the current version of PHP is greater then the supplied value
*
* Since there are a few places where we conditionally test for PHP > 5
* we'll set a static variable.
*
* @access	public
* @param	string
* @return	bool	TRUE if the current version is $version or higher
*/
	function is_php($version = '5.0.0')
	{
		static $_is_php;
		$version = (string)$version;

		if ( ! isset($_is_php[$version]))
		{
			$_is_php[$version] = (version_compare(PHP_VERSION, $version) < 0) ? FALSE : TRUE;
		}

		return $_is_php[$version];
	}

// ------------------------------------------------------------------------

/**
 * Tests for file writability
 *
 * is_writable() returns TRUE on Windows servers when you really can't write to
 * the file, based on the read-only attribute.  is_writable() is also unreliable
 * on Unix servers if safe_mode is on.
 *
 * @access	private
 * @return	void
 */
	function is_really_writable($file)
	{
		// If we're on a Unix server with safe_mode off we call is_writable
		if (DIRECTORY_SEPARATOR == '/' AND @ini_get("safe_mode") == FALSE)
		{
			return is_writable($file);
		}

		// For windows servers and safe_mode "on" installations we'll actually
		// write a file then read it.  Bah...
		if (is_dir($file))
		{
			$file = rtrim($file, '/').'/'.md5(mt_rand(1,100).mt_rand(1,100));

			if (($fp = @fopen($file, FOPEN_WRITE_CREATE)) === FALSE)
			{
				return FALSE;
			}

			fclose($fp);
			@chmod($file, DIR_WRITE_MODE);
			@unlink($file);
			return TRUE;
		}
		elseif (($fp = @fopen($file, FOPEN_WRITE_CREATE)) === FALSE)
		{
			return FALSE;
		}

		fclose($fp);
		return TRUE;
	}

// ------------------------------------------------------------------------

/**
* Class registry
*
* This function acts as a singleton.  If the requested class does not
* exist it is instantiated and set to a static variable.  If it has
* previously been instantiated the variable is returned.
*
* @access	public
* @param	string	the class name being requested
* @param	string	the directory where the class should be found
* @param	string	the class name prefix
* @return	object
*/
	function &load_class($class, $directory = 'libraries', $prefix = 'CI_')
	{
		static $_classes = array();

		// Does the class exist?  If so, we're done...
		if (isset($_classes[$class]))
		{
			return $_classes[$class];
		}

		$name = FALSE;

		// Look for the class first in the native system/libraries folder
		// thenin the local application/libraries folder
		foreach (array(BASEPATH, APPPATH) as $path)
		{
			if (file_exists($path.$directory.'/'.$class.EXT))
			{
				$name = $prefix.$class;

				if (class_exists($name) === FALSE)
				{
					require($path.$directory.'/'.$class.EXT);
				}

				break;
			}
		}

		// Is the request a class extension?  If so we load it too
		if (file_exists(APPPATH.$directory.'/'.config_item('subclass_prefix').$class.EXT))
		{
			$name = config_item('subclass_prefix').$class;

			if (class_exists($name) === FALSE)
			{
				require(APPPATH.$directory.'/'.config_item('subclass_prefix').$class.EXT);
			}
		}

		// Did we find the class?
		if ($name === FALSE)
		{
			// Note: We use exit() rather then show_error() in order to avoid a
			// self-referencing loop with the Excptions class
			exit('Unable to locate the specified class: '.$class.EXT);
		}

		// Keep track of what we just loaded
		is_loaded($class);

		$_classes[$class] = new $name();
		return $_classes[$class];
	}

// --------------------------------------------------------------------

/**
* Keeps track of which libraries have been loaded.  This function is
* called by the load_class() function above
*
* @access	public
* @return	array
*/
	function is_loaded($class = '')
	{
		static $_is_loaded = array();

		if ($class != '')
		{
			$_is_loaded[strtolower($class)] = $class;
		}

		return $_is_loaded;
	}

// ------------------------------------------------------------------------

/**
* Loads the main config.php file
*
* This function lets us grab the config file even if the Config class
* hasn't been instantiated yet
*
* @access	private
* @return	array
*/
	function &get_config($replace = array())
	{
		static $_config;

		if (isset($_config))
		{
			return $_config[0];
		}

		// Fetch the config file
		if ( ! file_exists(APPPATH.'config/config'.EXT))
		{
			exit('The configuration file does not exist.');
		}
		else
		{
			require(APPPATH.'config/config'.EXT);
		}

		// Does the $config array exist in the file?
		if ( ! isset($config) OR ! is_array($config))
		{
			exit('Your config file does not appear to be formatted correctly.');
		}

		// Are any values being dynamically replaced?
		if (count($replace) > 0)
		{
			foreach ($replace as $key => $val)
			{
				if (isset($config[$key]))
				{
					$config[$key] = $val;
				}
			}
		}

		return $_config[0] =& $config;
	}

// ------------------------------------------------------------------------

/**
* Returns the specified config item
*
* @access	public
* @return	mixed
*/
	function config_item($item)
	{
		static $_config_item = array();

		if ( ! isset($_config_item[$item]))
		{
			$config =& get_config();

			if ( ! isset($config[$item]))
			{
				return FALSE;
			}
			$_config_item[$item] = $config[$item];
		}

		return $_config_item[$item];
	}

// ------------------------------------------------------------------------

/**
* Error Handler
*
* This function lets us invoke the exception class and
* display errors using the standard error template located
* in application/errors/errors.php
* This function will send the error page directly to the
* browser and exit.
*
* @access	public
* @return	void
*/
	function show_error($message, $status_code = 500, $heading = 'An Error Was Encountered')
	{
		$_error =& load_class('Exceptions', 'core');
		echo $_error->show_error($heading, $message, 'error_general', $status_code);
		exit;
	}

// ------------------------------------------------------------------------

/**
* 404 Page Handler
*
* This function is similar to the show_error() function above
* However, instead of the standard error template it displays
* 404 errors.
*
* @access	public
* @return	void
*/
	function show_404($page = '', $log_error = TRUE)
	{
		$_error =& load_class('Exceptions', 'core');
		$_error->show_404($page, $log_error);
		exit;
	}

// ------------------------------------------------------------------------

/**
* Error Logging Interface
*
* We use this as a simple mechanism to access the logging
* class and send messages to be logged.
*
* @access	public
* @return	void
*/
	function log_message($level = 'error', $message, $php_error = FALSE)
	{
		static $_log;

		if (config_item('log_threshold') == 0)
		{
			return;
		}

		$_log =& load_class('Log');
		$_log->write_log($level, $message, $php_error);
	}

// ------------------------------------------------------------------------

/**
 * Set HTTP Status Header
 *
 * @access	public
 * @param	int		the status code
 * @param	string
 * @return	void
 */
	function set_status_header($code = 200, $text = '')
	{
		$stati = array(
							200	=> 'OK',
							201	=> 'Created',
							202	=> 'Accepted',
							203	=> 'Non-Authoritative Information',
							204	=> 'No Content',
							205	=> 'Reset Content',
							206	=> 'Partial Content',

							300	=> 'Multiple Choices',
							301	=> 'Moved Permanently',
							302	=> 'Found',
							304	=> 'Not Modified',
							305	=> 'Use Proxy',
							307	=> 'Temporary Redirect',

							400	=> 'Bad Request',
							401	=> 'Unauthorized',
							403	=> 'Forbidden',
							404	=> 'Not Found',
							405	=> 'Method Not Allowed',
							406	=> 'Not Acceptable',
							407	=> 'Proxy Authentication Required',
							408	=> 'Request Timeout',
							409	=> 'Conflict',
							410	=> 'Gone',
							411	=> 'Length Required',
							412	=> 'Precondition Failed',
							413	=> 'Request Entity Too Large',
							414	=> 'Request-URI Too Long',
							415	=> 'Unsupported Media Type',
							416	=> 'Requested Range Not Satisfiable',
							417	=> 'Expectation Failed',

							500	=> 'Internal Server Error',
							501	=> 'Not Implemented',
							502	=> 'Bad Gateway',
							503	=> 'Service Unavailable',
							504	=> 'Gateway Timeout',
							505	=> 'HTTP Version Not Supported'
						);

		if ($code == '' OR ! is_numeric($code))
		{
			show_error('Status codes must be numeric', 500);
		}

		if (isset($stati[$code]) AND $text == '')
		{
			$text = $stati[$code];
		}

		if ($text == '')
		{
			show_error('No status text available.  Please check your status code number or supply your own message text.', 500);
		}

		$server_protocol = (isset($_SERVER['SERVER_PROTOCOL'])) ? $_SERVER['SERVER_PROTOCOL'] : FALSE;

		if (substr(php_sapi_name(), 0, 3) == 'cgi')
		{
			header("Status: {$code} {$text}", TRUE);
		}
		elseif ($server_protocol == 'HTTP/1.1' OR $server_protocol == 'HTTP/1.0')
		{
			header($server_protocol." {$code} {$text}", TRUE, $code);
		}
		else
		{
			header("HTTP/1.1 {$code} {$text}", TRUE, $code);
		}
	}

// --------------------------------------------------------------------

/**
* Exception Handler
*
* This is the custom exception handler that is declaired at the top
* of Codeigniter.php.  The main reason we use this is to permit
* PHP errors to be logged in our own log files since the user may
* not have access to server logs. Since this function
* effectively intercepts PHP errors, however, we also need
* to display errors based on the current error_reporting level.
* We do that with the use of a PHP error template.
*
* @access	private
* @return	void
*/
	function _exception_handler($severity, $message, $filepath, $line)
	{
		 // We don't bother with "strict" notices since they tend to fill up
		 // the log file with excess information that isn't normally very helpful.
		 // For example, if you are running PHP 5 and you use version 4 style
		 // class functions (without prefixes like "public", "private", etc.)
		 // you'll get notices telling you that these have been deprecated.
		if ($severity == E_STRICT)
		{
			return;
		}

		$_error =& load_class('Exceptions', 'core');

		// Should we display the error? We'll get the current error_reporting
		// level and add its bits with the severity bits to find out.
		if (($severity & error_reporting()) == $severity)
		{
			$_error->show_php_error($severity, $message, $filepath, $line);
		}

		// Should we log the error?  No?  We're done...
		if (config_item('log_threshold') == 0)
		{
			return;
		}

		$_error->log_exception($severity, $message, $filepath, $line);
	}

	// --------------------------------------------------------------------

	/**
	 * Remove Invisible Characters
	 *
	 * This prevents sandwiching null characters
	 * between ascii characters, like Java\0script.
	 *
	 * @access	public
	 * @param	string
	 * @return	string
	 */
	function remove_invisible_characters($str)
	{
		static $non_displayables;

		if ( ! isset($non_displayables))
		{
			// every control character except newline (dec 10), carriage return (dec 13), and horizontal tab (dec 09),
			$non_displayables = array(
										'/%0[0-8bcef]/',			// url encoded 00-08, 11, 12, 14, 15
										'/%1[0-9a-f]/',				// url encoded 16-31
										'/[\x00-\x08]/',			// 00-08
										'/\x0b/', '/\x0c/',			// 11, 12
										'/[\x0e-\x1f]/'				// 14-31
									);
		}

		do
		{
			$cleaned = $str;
			$str = preg_replace($non_displayables, '', $str);
		}
		while ($cleaned != $str);

		return $str;
	}

	function pr($arr,$e=1)
	{
		if(is_array($arr))
		{
			echo "<pre>";
			print_r($arr);
			echo "</pre>";		
		}
		else
		{
			echo "<br>Not an array...<br>";
			echo "<pre>";
			var_dump($arr);
			echo "</pre>";
			
		}
		if($e==1)
		{
			exit();
		}
		else
		{
			echo "<br>";
		}
			
	}


	function inputEscapeString($str,$Type='DB',$htmlEntitiesEncode = true)
	{
		if($Type === 'DB')
		{
			if(get_magic_quotes_gpc()===0)
			{
				$str = addslashes($str);
			}
		}
		elseif($Type === 'FILE')
		{
			if(get_magic_quotes_gpc()===1)
			{
				$str = stripslashes($str);	
			}
		}
		else
		{
			$str = $str;
		}
		
		if($htmlEntitiesEncode === true)
		{
			$str = htmlentities($str);
			//$str = htmlspecialchars($str);
		}
		return $str;
	}
		
		
	function outputEscapeString($str,$Type = 'INPUT', $htmlEntitiesDecode = true )
	{
		if(get_magic_quotes_runtime()==1)
		{
			$str = stripslashes($str);	
		}
		
		if($htmlEntitiesDecode === true)
		{
			$str = html_entity_decode($str);
		}
		
		if($Type == 'INPUT')
		{
			//$str = htmlentities($str);
			$str = htmlspecialchars($str);
		}
		elseif($Type == 'TEXTAREA')
		{
			$str = $str;
		}
		elseif($Type == 'HTML')
		{
			$str = nl2br($str);
		}
		else
		{
			$str = $str;
		}
		
		return $str;
	}
	
	if ( ! function_exists('file_upload_absolute_path'))
	{
		function file_upload_absolute_path()
		{
			$CI =& get_instance();
			return $CI->config->slash_item('file_upload_absolute_path');
		}
	}
	
	
	
	if ( ! function_exists('file_upload_base_url'))
	{
		function file_upload_base_url()
		{
			$CI =& get_instance();
			return $CI->config->slash_item('file_upload_base_url');
		}
	}
	
	
	if ( ! function_exists('server_absolute_path'))
	{
		function server_absolute_path()
		{
			$CI =& get_instance();
			return $CI->config->slash_item('server_absolute_path');
		}
	}
	
	if ( ! function_exists('front_base_url'))
	{
		function front_base_url()
		{
			$CI =& get_instance();
			return $CI->config->slash_item('front_base_url');
		}
	}
	
	if ( ! function_exists('css_images_js_base_url'))
	{
		function css_images_js_base_url()
		{
			$CI =& get_instance();
			return $CI->config->slash_item('css_images_js_base_url');
		}
	}
	
	if ( ! function_exists('tableOrdering'))
	{
		function tableOrdering($title,$field,$sortfield='',$sorttype='ASC')
		{
			$CI =& get_instance();
			$image_path = css_images_js_base_url();
			if($sortfield==$field && $sorttype=='ASC'){
				$returnOption = '<a href="javascript:tableOrdering(\''.$field.'\',\'DESC\');" title="Click to sort by this column" class="textHeader">'.$title.'&nbsp;&nbsp;<img src="'.$image_path.'images/sort_asc.png" alt=""></a>';
			}elseif($sortfield==$field && $sorttype=='DESC'){
				$returnOption = '<a href="javascript:tableOrdering(\''.$field.'\',\'ASC\');" title="Click to sort by this column" class="textHeader">'.$title.'&nbsp;&nbsp;<img src="'.$image_path.'images/sort_desc.png" alt=""></a>';
			}else{
				$returnOption = '<a href="javascript:tableOrdering(\''.$field.'\',\'DESC\');" title="Click to sort by this column" class="textHeader">'.$title.'</a>';
			}
			return $returnOption;
		}
	}
	
	if( ! function_exists('make_thumb')){
		function make_thumb($img_name,$filename,$new_w,$new_h,$ext)
		{
			//get image extension.
			
			//creates the new image using the appropriate function from gd library
			
			if(!strcmp(".jpg",$ext) || !strcmp(".jpeg",$ext))
			$src_img=@imagecreatefromjpeg($img_name);
			
			if(!strcmp(".gif",$ext))
			$src_img=@imagecreatefromgif($img_name);
			
			if(!strcmp(".bmp",$ext))
			$src_img=@imagecreatefromwbmp($img_name);
		
			
			if(!strcmp(".png",$ext))
			$src_img=@imagecreatefrompng($img_name);
			
			if($src_img){
			//gets the dimmensions of the image
			$old_x=imagesx($src_img);
			$old_y=imagesy($src_img);
			
			// next we will calculate the new dimmensions for the thumbnail image
			// the next steps will be taken:
			// 1. calculate the ratio by dividing the old dimmensions with the new ones
			// 2. if the ratio for the width is higher, the width will remain the one define in WIDTH variable
			// and the height will be calculated so the image ratio will not change
			// 3. otherwise we will use the height ratio for the image
			// as a result, only one of the dimmensions will be from the fixed ones
			$ratio1=$old_x/$new_w;
			$ratio2=$old_y/$new_h;
			if($ratio1>$ratio2) {
				$thumb_w=$new_w;
				$thumb_h=$old_y/$ratio1;
			}
			else {
				$thumb_h=$new_h;
				$thumb_w=$old_x/$ratio2;
			}
			
			// we create a new image with the new dimmensions
			$dst_img=imagecreatetruecolor($thumb_w,$thumb_h);
			
			/*********************************************************************************************************************************
			if($transparency) 
			{*/
				if($ext==".png") {
					imagealphablending($dst_img, false);
					$colorTransparent = imagecolorallocatealpha($dst_img, 0, 0, 0, 127);
					imagefill($dst_img, 0, 0, $colorTransparent);
					imagesavealpha($dst_img, true);
				} 
				elseif($ext==".gif") {
					$trnprt_indx = imagecolortransparent($src_img);
					if ($trnprt_indx >= 0) {
						//its transparent
						$trnprt_color = imagecolorsforindex($src_img, $trnprt_indx);
						$trnprt_indx = imagecolorallocate($dst_img, $trnprt_color['red'], $trnprt_color['green'], $trnprt_color['blue']);
						imagefill($dst_img, 0, 0, $trnprt_indx);
						imagecolortransparent($dst_img, $trnprt_indx);
					}
				}
			/*} 
			else 
			{
				Imagefill($dst_img, 0, 0, imagecolorallocate($dst_img, 255, 255, 255));
			}
			*********************************************************************************************************************************/
			
			// resize the big image to the new created one
			imagecopyresampled($dst_img,$src_img,0,0,0,0,$thumb_w,$thumb_h,$old_x,$old_y);
			
			// output the created image to the file. Now we will have the thumbnail into the file named by $filename
			if(!strcmp(".png",$ext))
				imagepng($dst_img,$filename);
			else
				imagejpeg($dst_img,$filename);
			
			if(!strcmp(".gif",$ext))
				imagegif($dst_img,$filename);
			if(!strcmp(".bmp",$ext))		
				imagewbmp($dst_img,$filename);	
			
				
			
			//destroys source and destination images.
			imagedestroy($dst_img);
			imagedestroy($src_img);
			
			return true;
			}else{
				return false;
			}
		}
	}
	
	if( ! function_exists('getProductImages')){
	function getProductImages($product_code)
	{
		$results = array($product_code.'.jpg');

		$directory = file_upload_absolute_path().'product_image_gallery/';
		$handler = opendir($directory);
		
		// open directory and walk through the filenames
		while ($file = readdir($handler)) {
		
		    // if file isn't this directory or its parent, add it to the results
		    if ($file != "." && $file != "..") {
		
		        // check with regex that the file format is what we're expecting and not something else
		        if(preg_match('#'.$product_code.'\_[^\s]#', $file)) {
		
		            // add to our file array for later use
		            $results[] = $file;
		        }
		    }
		}
		
		return $results;
		}
	}
	
	if( ! function_exists('getTags')){
		function getTags()
		{
			$CI =& get_instance();
			$sql = "select tags_name,url FROM ".TAGS." where `status` = 'Active' ORDER BY tags_name ASC ";
			$recordSet = $CI->db->query($sql);
			$result = $recordSet->result_array();
			for($i=0;$i<count($result);$i++){
				
				echo '<li><a href="'.base_url().'tags/'.$result[$i]['url'].'">'.$result[$i]['tags_name'].'</a>
				</li>';
				
			}
		}
	}
	
/* End of file Common.php */
/* Location: ./system/core/Common.php */